Fix CertificateTest#testVerifyPublicKeyString2

Use a provider that can handle the provided public-key.

bug: 21816913

(cherry picked from commit cfcb7ad5b68ad854ddbfe5ca1afcf85a1bb61f68)

Change-Id: I581c162f6c57d13e53252fc45ec992b2e217fe81
1 file changed